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US 9,438,346 B2Granted
Dual rate transceiver
AssigneeCisco Technology, Inc.
InventorsNorman Tang, Liang Ping Peng, David Lai, Anthony Nguyen
Life of this patent
Estimating the term…
Abstract
A dual rate transceiver may be provided. First, a host data speed of a host device may be detected. Then a last know data speed of a transceiver may be determined. Next, it may be determined that the host data speed and the last know data speed are different. And in response to determining that the host data speed and the last know data speed are different, the transceiver may be reconfigured to operate at the host data speed.
Claims19
A method comprising:
- detecting a host data speed of a host device from a system host transmit data path, wherein detecting the host data speed comprises:
- branching out the system host transmit data path over at least one register connected to the system host transmit data path,
- filtering the output from the at least one register to a low pass filter, and
- detecting, by an amplitude detector connected to an output of the low pass filter, the host data speed from the filtered output;
- determining a last know data speed of a transceiver;
- determining that the host data speed and the last know data speed are different;
- and
- reconfiguring, in response to determining that the host data speed and the last know data speed are different, the transceiver to operate at the host data speed.
5 more elements
A system comprising:
- a memory storage;
- and
- a processing unit coupled to the memory storage, the processing unit being configured to:
- receive, from a data rate detector, a host data speed of a host device from a system host transmit data path, wherein the data rate detector comprises:
- a first resistor connected to the system host transmit data path,
- a second resistor connected to the system host transmit data path,
- a low pass filter connected to the first resistor and the second resistor, and
- an amplitude detector connected to an output of the low pass filter, the amplitude detector configures to provide an output to the transceiver controller indicating the host data speed;
- receive a last know data speed of a transceiver;
- determine that the host data speed and the last know data speed are different;
- and
- reconfigure, in response to determining that the host data speed and the last know data speed are different, the transceiver to operate at the host data speed, wherein the processing unit being configured to reconfigure the transceiver to operate at the host data speed comprises the processing unit being configured to:
- change a memory in the transceiver to indicate that the transceiver is operating at the host data speed and changing the memory in the transceiver to indicate digital optical monitoring (DOM) parameters consistent with the host data speed,
- configure a laser power controller in the transceiver to operate at a transmit optical specification of the host data speed,
- save to the memory in the transceiver the host data speed as the last known data rate, and
- toggle a pin on a connecter on the transceiver.
13 more elements
An apparatus comprising:
- a data rate detector configured to detect a host data speed of a host device, the data rate detector being connected to a system host transmit data path, wherein the data rate detector comprises:
- a first resistor connected to the system host transmit data path,
- a second resistor connected to the system host transmit data path,
- a low pass filter connected to the first resistor and the second resistor, and
- an amplitude detector connected to an output of the low pass filter, the amplitude detector configures to provide an output to the transceiver controller indicating the host data speed;
- and
- a transceiver controller configured to:
- receive the host data speed of the host device from the data rate detector;
- receive a last know data speed of a transceiver;
- determine that the host data speed and the last know data speed are different;
- and
- reconfigure, in response to determining that the host data speed and the last know data speed are different, the transceiver to operate at the host data speed.
9 more elements
Dependencies are inferred from the claim text.